On the Feasibility of Harmonic Adaptability Remote Testing Method

As a significant part of grid code compliance verification, harmonic adaptability (HA) capability on-site testing is indispensable for offshore wind turbines. Although the HA remote testing method having no restrictions of harsh environment and resulting access limitation is regarded as an alternative to the existing testing method, the application scope and condition are not indicated explicitly, which enormously reduces its practicability in real testing. This article investigates the feasibility of the HA remote testing method. Based on the analysis of its working principle and a comprehensive caparison, two dominating factors affecting the feasibility are identified: the capacity of the applied active power filter and the power transmission capability of submarine cable. An assessment method comprising two indicators, i.e., the maximum resonance amplitude that can be suppressed and the feasible testing distance, is developed for the feasibility study. The application scope of the HA remote testing method is obtained with the proposed corresponding algorithm for the derived indicators. Extensive simulation results show that the HA remote testing method is viable and promising within the specified scope.